The book, written by JR Moehringer, a Pulitzer Prize-winning ghostwriter, is due in October, although there has been no update from the Duke team or his publishers since it was first announced in July 2021. Next month’s visit is not expected to include any promotion. The couple will travel to Manchester for the One Young World Summit, an event that brings together young leaders from more than 190 countries, on September 5. The Duchess, 41, will deliver the keynote address at the opening ceremony and the couple will meet a group of representatives who are “doing great work for gender equality”, the organization revealed. He has been an adviser to the organization since 2014 and has described it as “the best think tank imaginable”. The event will be attended by fellow councilors including Sir Bob Geldof and Mary Robinson, the former President of Ireland. The pair will then head to Germany for the Invictus Games Dusseldorf 2023: One Year to Go event on September 7, before returning to the UK for the WellChild Awards the following day. The Duke of Sussex, 37, has been a patron of WellChild since 2007, a charity that helps seriously ill children and young people leave hospital and host their families.